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openwrt-xburst/target/linux/coldfire/patches/036-Add-FlexCAN-support-on-ColdFire-M548X-M54418-platfor.patch
kaloz 7e7649baa9 [coldfire]: switch to 2.6.38 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31546 3c298f89-4303-0410-b956-a3cf2f4a3e73
2012-05-01 07:00:17 +00:00

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From c3b97e08b06be76ee9f2b410b13c045425fc7f3e Mon Sep 17 00:00:00 2001
From: Jingchang Lu <b35083@freescale.com>
Date: Thu, 4 Aug 2011 09:59:48 +0800
Subject: [PATCH 36/52] Add FlexCAN support on ColdFire M548X, M54418 platform
Each cpu core has two FlexCAN interface, and the M54418's FlexCAN
also support Rx message buffer FIFO mode but M548X not.
Signed-off-by: Jingchang Lu <b35083@freescale.com>
---
arch/m68k/Kconfig | 2 +
arch/m68k/coldfire/m5441x/Makefile | 4 +
arch/m68k/coldfire/m5441x/mcf-flexcan.c | 121 ++++++++++++++++
arch/m68k/coldfire/m547x/Makefile | 3 +
arch/m68k/coldfire/m547x/mcf-flexcan.c | 117 +++++++++++++++
drivers/net/can/Kconfig | 9 ++
drivers/net/can/flexcan.c | 239 ++++++++++++++++++++++++++++++-
7 files changed, 489 insertions(+), 6 deletions(-)
create mode 100644 arch/m68k/coldfire/m5441x/mcf-flexcan.c
create mode 100644 arch/m68k/coldfire/m547x/mcf-flexcan.c
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -372,6 +372,7 @@ config M547X
config M548X
bool
depends on M547X_8X
+ select HAVE_CAN_FLEXCAN
default n
choice
@@ -430,6 +431,7 @@ config M5441X
select GENERIC_TIME
select USB_EHCI_FSL
select HAVE_FSL_USB_DR
+ select HAVE_CAN_FLEXCAN
help
This option will add support for the MCF5441x processor with mmu.
--- a/arch/m68k/coldfire/m5441x/Makefile
+++ b/arch/m68k/coldfire/m5441x/Makefile
@@ -36,3 +36,7 @@ endif
ifneq ($(CONFIG_MODELO_SWITCH),)
obj-y += l2switch.o
endif
+
+ifneq ($(CONFIG_CAN_FLEXCAN),)
+obj-y += mcf-flexcan.o
+endif
--- /dev/null
+++ b/arch/m68k/coldfire/m5441x/mcf-flexcan.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: Huan Wang, b18965@freescale.com, Fri Aug 08 2008
+ *
+ * Description:
+ * CAN bus driver for Freescale Coldfire embedded CPU
+ *
+ * Changelog:
+ * Fri Aug 08 2008 Huan Wang <b18965@freescale.com>
+ * - create, support for MCF548x
+ *
+ * Tue Dec 08 2009 ChengJu Cai <b22600@freescale.com>
+ * - support for MCF532x MCF5253 MCF5227x
+ *
+ * July 2011 Jingchang.Lu <b35083@freescale.com>
+ * - Add into kernel CAN driver layer
+ *
+ * This file is part of the Linux kernel
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <asm/mcfsim.h>
+
+
+static struct resource mcf5441x_can0_resources[] = {
+ [0] = {
+ .start = 0xFC020000,
+ .end = 0xFC0208C0,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 0 + 64 + 64,
+ .end = 0 + 64 + 64,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource mcf5441x_can1_resources[] = {
+ [0] = {
+ .start = 0xFC024000,
+ .end = 0xFC0248C0,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 4 + 64 + 64,
+ .end = 4 + 64 + 64,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device mcf_flexcan[PDEV_MAX] = {
+ [0] = {
+ .name = "flexcan",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(mcf5441x_can0_resources),
+ .resource = mcf5441x_can0_resources,
+ },
+ [1] = {
+ .name = "flexcan",
+ .id = 1,
+ .num_resources = ARRAY_SIZE(mcf5441x_can1_resources),
+ .resource = mcf5441x_can1_resources,
+ },
+
+};
+
+
+static void __init mcf_flexcan_config(void)
+{
+ MCF_PM_PPMCR0 = 8; /* enable FlexCAN0 clock */
+ MCF_PM_PPMCR0 = 9; /* enable FlexCAN1 clock */
+
+ /* CAN0 */
+ MCF_GPIO_PAR_CANI2C =
+ (MCF_GPIO_PAR_CANI2C & MCF_GPIO_PAR_CANI2C_I2C0SCL_MASK) |
+ MCF_GPIO_PAR_CANI2C_I2C0SCL_CAN0TX;
+ MCF_GPIO_PAR_CANI2C =
+ (MCF_GPIO_PAR_CANI2C & MCF_GPIO_PAR_CANI2C_I2C0SDA_MASK) |
+ MCF_GPIO_PAR_CANI2C_I2C0SDA_CAN0RX;
+ /* CAN1 */
+ MCF_GPIO_PAR_CANI2C =
+ (MCF_GPIO_PAR_CANI2C & MCF_GPIO_PAR_CANI2C_CAN1TX_MASK) |
+ MCF_GPIO_PAR_CANI2C_CAN1TX_CAN1TX;
+ MCF_GPIO_PAR_CANI2C =
+ (MCF_GPIO_PAR_CANI2C & MCF_GPIO_PAR_CANI2C_CAN1RX_MASK) |
+ MCF_GPIO_PAR_CANI2C_CAN1RX_CAN1RX;
+
+
+}
+
+static int __init flexcan_of_to_pdev(void)
+{
+ int i, err = -ENODEV;
+ for (i = 0; i < PDEV_MAX; i++) {
+ err = platform_device_register(&mcf_flexcan[i]);
+ if (err)
+ return err;
+ printk(KERN_INFO "ColdFire FlexCAN devices loaded\n");
+ }
+ return err;
+}
+
+static int __init mcf_flexcan_init(void)
+{
+ int err;
+ mcf_flexcan_config();
+ err = flexcan_of_to_pdev();
+
+ return 0;
+}
+
+arch_initcall(mcf_flexcan_init);
--- a/arch/m68k/coldfire/m547x/Makefile
+++ b/arch/m68k/coldfire/m547x/Makefile
@@ -5,3 +5,6 @@
obj-$(CONFIG_M547X_8X) += config.o mcf548x-devices.o devices.o
obj-$(CONFIG_PCI) += pci.o pci_dummy.o
obj-$(CONFIG_MCD_DMA) += dma.o
+ifneq ($(CONFIG_CAN_FLEXCAN),)
+obj-y += mcf-flexcan.o
+endif
--- /dev/null
+++ b/arch/m68k/coldfire/m547x/mcf-flexcan.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: Huan Wang, b18965@freescale.com, Fri Aug 08 2008
+ *
+ * Description:
+ * CAN bus driver for Freescale Coldfire embedded CPU
+ *
+ * Changelog:
+ * Fri Aug 08 2008 Huan Wang <b18965@freescale.com>
+ * - create, support for MCF548x
+ *
+ * Tue Dec 08 2009 ChengJu Cai <b22600@freescale.com>
+ * - support for MCF532x MCF5253 MCF5227x
+ *
+ * July 2011 Jingchang.Lu <b35083@freescale.com>
+ * - Add into kernel CAN driver layer
+ *
+ * This file is part of the Linux kernel
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <asm/mcfsim.h>
+
+
+static struct resource mcf548x_can0_resources[] = {
+ [0] = {
+ .start = MCF_MBAR + 0x0000A000,
+ .end = MCF_MBAR + 0x0000A7FF,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 49 + 64,
+ .end = 49 + 64,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource mcf548x_can1_resources[] = {
+ [0] = {
+ .start = MCF_MBAR + 0x0000A800,
+ .end = MCF_MBAR + 0x0000AFFF,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 55 + 64,
+ .end = 55 + 64,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device mcf_flexcan[PDEV_MAX] = {
+ [0] = {
+ .name = "flexcan",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(mcf548x_can1_resources),
+ .resource = mcf548x_can0_resources,
+ },
+ [1] = {
+ .name = "flexcan",
+ .id = 1,
+ .num_resources = ARRAY_SIZE(mcf548x_can1_resources),
+ .resource = mcf548x_can1_resources,
+ },
+
+};
+
+
+static void __init mcf_flexcan_config(void)
+{
+ int i;
+ MCF_PAR_TIMER = MCF_PAR_TIMER | 0x28;
+ MCF_PAR_TIMER = MCF_PAR_TIMER & 0xf8;
+ MCF_PAR_DSPI = MCF_PAR_DSPI | 0x0a00;
+ MCF_PAR_FECI2CIRQ = MCF_PAR_FECI2CIRQ | 0x0283;
+ MCF_PAR_PSCn(2) = MCF_PAR_PSCn(2) & 0x0f;
+ MCF_PAR_PSCn(2) = MCF_PAR_PSCn(2) | 0x50;
+
+ for (i = 0; i < 2; i++) {
+ MCF_ICR(ISC_CANn_MBOR(i)) = 0x33 + 0x01 * i;
+ MCF_ICR(ISC_CANn_ERR(i)) = 0x33 + 0x01 * i;
+ MCF_ICR(ISC_CANn_BUSOFF(i)) = 0x33 + 0x01 * i;
+ }
+
+
+}
+
+static int __init flexcan_of_to_pdev(void)
+{
+ int i, err = -ENODEV;
+ for (i = 0; i < PDEV_MAX; i++) {
+ err = platform_device_register(&mcf_flexcan[i]);
+ if (err)
+ return err;
+ printk(KERN_INFO "ColdFire FlexCAN devices loaded\n");
+ }
+ return err;
+}
+
+static int __init mcf_flexcan_init(void)
+{
+ int err;
+ mcf_flexcan_config();
+ err = flexcan_of_to_pdev();
+
+ return 0;
+}
+
+arch_initcall(mcf_flexcan_init);
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -103,6 +103,15 @@ config CAN_FLEXCAN
---help---
Say Y here if you want to support for Freescale FlexCAN.
+config FLEXCAN_NORXFIFO
+ bool "FlexCAN message buffer without Rx FIFO mode"
+ depends on CAN_FLEXCAN && COLDFIRE
+ default n
+ ---help---
+ Say Y here if you FlexCAN message buffer has no Rx FIFO mode.
+ Freescale Coldfire series have different FlexCAN core version,
+ MCF54418's support Rx FIFO mode while others such as MCF5485 not.
+
config PCH_CAN
tristate "PCH CAN"
depends on CAN_DEV && PCI
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -4,6 +4,7 @@
* Copyright (c) 2005-2006 Varma Electronics Oy
* Copyright (c) 2009 Sascha Hauer, Pengutronix
* Copyright (c) 2010 Marc Kleine-Budde, Pengutronix
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All rights reserved.
*
* Based on code originally by Andrey Volkov <avolkov@varma-el.com>
*
@@ -35,8 +36,28 @@
#include <linux/module.h>
#include <linux/platform_device.h>
+#ifndef CONFIG_COLDFIRE
#include <mach/clock.h>
+#else
+#include <asm/mcfsim.h>
+
+#undef readb
+#undef readw
+#undef readl
+#define readb(addr) __raw_readb(addr)
+#define readw(addr) __raw_readw(addr)
+#define readl(addr) __raw_readl(addr)
+
+#undef writeb
+#undef writew
+#undef writel
+#define writeb(b, addr) __raw_writeb(b, addr)
+#define writew(b, addr) __raw_writew(b, addr)
+#define writel(b, addr) __raw_writel(b, addr)
+
+#endif
+
#define DRV_NAME "flexcan"
/* 8 for RX fifo and 2 error handling */
@@ -85,12 +106,34 @@
#define FLEXCAN_CTRL_LOM BIT(3)
#define FLEXCAN_CTRL_PROPSEG(x) ((x) & 0x07)
#define FLEXCAN_CTRL_ERR_BUS (FLEXCAN_CTRL_ERR_MSK)
+
+#ifdef CONFIG_COLDFIRE
+
+# if defined(CONFIG_M548X)
+
+#define FLEXCAN_CTRL_ERR_STATE FLEXCAN_CTRL_BOFF_MSK
+#define FLEXCAN_CTRL_ERR_ALL \
+ (FLEXCAN_CTRL_BOFF_MSK | FLEXCAN_CTRL_ERR_MSK)
+
+# elif defined(CONFIG_M5441X)
+
#define FLEXCAN_CTRL_ERR_STATE \
(FLEXCAN_CTRL_TWRN_MSK | FLEXCAN_CTRL_RWRN_MSK | \
FLEXCAN_CTRL_BOFF_MSK)
#define FLEXCAN_CTRL_ERR_ALL \
(FLEXCAN_CTRL_ERR_BUS | FLEXCAN_CTRL_ERR_STATE)
+# endif
+
+#else /* !CONFIG_COLDFIRE */
+
+#define FLEXCAN_CTRL_ERR_STATE \
+ (FLEXCAN_CTRL_TWRN_MSK | FLEXCAN_CTRL_RWRN_MSK | \
+ FLEXCAN_CTRL_BOFF_MSK)
+#define FLEXCAN_CTRL_ERR_ALL \
+ (FLEXCAN_CTRL_ERR_BUS | FLEXCAN_CTRL_ERR_STATE)
+
+#endif
/* FLEXCAN error and status register (ESR) bits */
#define FLEXCAN_ESR_TWRN_INT BIT(17)
#define FLEXCAN_ESR_RWRN_INT BIT(16)
@@ -121,6 +164,18 @@
(FLEXCAN_ESR_ERR_BUS | FLEXCAN_ESR_ERR_STATE)
/* FLEXCAN interrupt flag register (IFLAG) bits */
+
+#ifdef CONFIG_FLEXCAN_NORXFIFO
+
+/* MB assignment for no Rx FIFO mode module */
+#define FLEXCAN_TX_BUF_ID 0
+#define FLEXCAN_RX_EXT_ID 15
+#define FLEXCAN_IFLAG_RX_FIFO_AVAILABLE 0xfffe
+#define FLEXCAN_IFLAG_DEFAULT \
+ (FLEXCAN_IFLAG_RX_FIFO_AVAILABLE | (0x01 << FLEXCAN_TX_BUF_ID))
+
+#else
+
#define FLEXCAN_TX_BUF_ID 8
#define FLEXCAN_IFLAG_BUF(x) BIT(x)
#define FLEXCAN_IFLAG_RX_FIFO_OVERFLOW BIT(7)
@@ -130,6 +185,7 @@
(FLEXCAN_IFLAG_RX_FIFO_OVERFLOW | FLEXCAN_IFLAG_RX_FIFO_AVAILABLE | \
FLEXCAN_IFLAG_BUF(FLEXCAN_TX_BUF_ID))
+#endif
/* FLEXCAN message buffers */
#define FLEXCAN_MB_CNT_CODE(x) (((x) & 0xf) << 24)
#define FLEXCAN_MB_CNT_SRR BIT(22)
@@ -163,7 +219,11 @@ struct flexcan_regs {
u32 iflag2; /* 0x2c */
u32 iflag1; /* 0x30 */
u32 _reserved2[19];
+#ifdef CONFIG_COLDFIRE
+ struct flexcan_mb cantxfg[CAN_MB];
+#else
struct flexcan_mb cantxfg[64];
+#endif
};
struct flexcan_priv {
@@ -181,8 +241,13 @@ struct flexcan_priv {
static struct can_bittiming_const flexcan_bittiming_const = {
.name = DRV_NAME,
+#ifdef CONFIG_COLDFIRE
+ .tseg1_min = 1,
+ .tseg1_max = 8,
+#else
.tseg1_min = 4,
.tseg1_max = 16,
+#endif
.tseg2_min = 2,
.tseg2_max = 8,
.sjw_max = 4,
@@ -248,7 +313,7 @@ static int flexcan_start_xmit(struct sk_
struct net_device_stats *stats = &dev->stats;
struct flexcan_regs __iomem *regs = priv->base;
struct can_frame *cf = (struct can_frame *)skb->data;
- u32 can_id;
+ u32 can_id, tmp, tmp1;
u32 ctrl = FLEXCAN_MB_CNT_CODE(0xc) | (cf->can_dlc << 16);
if (can_dropped_invalid_skb(dev, skb))
@@ -259,6 +324,11 @@ static int flexcan_start_xmit(struct sk_
if (cf->can_id & CAN_EFF_FLAG) {
can_id = cf->can_id & CAN_EFF_MASK;
ctrl |= FLEXCAN_MB_CNT_IDE | FLEXCAN_MB_CNT_SRR;
+#ifdef CONFIG_COLDFIRE
+ tmp = (can_id & CAN_SFF_MASK) << 18;
+ tmp1 = can_id >> 11;
+ can_id = tmp | tmp1;
+#endif
} else {
can_id = (cf->can_id & CAN_SFF_MASK) << 18;
}
@@ -456,6 +526,87 @@ static int flexcan_poll_state(struct net
return 1;
}
+#ifdef CONFIG_FLEXCAN_NORXFIFO
+/* Get one frame from receive message buffer */
+static int flexcan_read_frame(struct net_device *dev)
+{
+ const struct flexcan_priv *priv = netdev_priv(dev);
+ struct flexcan_regs __iomem *regs = priv->base;
+ struct net_device_stats *stats = &dev->stats;
+ struct can_frame *cf;
+ struct sk_buff *skb;
+ struct flexcan_mb __iomem *mb;
+ u32 reg_iflag1, reg_ctrl, reg_id, i;
+
+ reg_iflag1 = readl(&regs->iflag1);
+
+ /* buf[0] if for TX */
+ for (i = 0; i < CAN_MB; i++) {
+ if (i == FLEXCAN_TX_BUF_ID)
+ continue;
+ /* find one received message slot */
+ if (reg_iflag1 & (0x01 << i))
+ break;
+ }
+ if (i >= CAN_MB)
+ return 0;
+
+ mb = &regs->cantxfg[i];
+
+ skb = alloc_can_skb(dev, &cf);
+ if (unlikely(!skb)) {
+ stats->rx_dropped++;
+ return 0;
+ }
+
+ reg_ctrl = readl(&mb->can_ctrl);
+ reg_id = readl(&mb->can_id);
+
+ /* deactive RX buff */
+ writel(0, &mb->can_ctrl);
+
+ if (reg_ctrl & FLEXCAN_MB_CNT_IDE) {
+#ifdef CONFIG_COLDFIRE
+ /* Coldfire can_id order */
+ cf->can_id = (reg_id & CAN_EFF_MASK) >> 18;
+ cf->can_id |= (reg_id & 0x3ffff) << 11;
+ cf->can_id |= CAN_EFF_FLAG;
+#else
+ cf->can_id = ((reg_id >> 0) & CAN_EFF_MASK) | CAN_EFF_FLAG;
+#endif
+ } else
+ cf->can_id = (reg_id >> 18) & CAN_SFF_MASK;
+
+ if (reg_ctrl & FLEXCAN_MB_CNT_RTR)
+ cf->can_id |= CAN_RTR_FLAG;
+ cf->can_dlc = get_can_dlc((reg_ctrl >> 16) & 0xf);
+
+ *(__be32 *)(cf->data + 0) = cpu_to_be32(readl(&mb->data[0]));
+ *(__be32 *)(cf->data + 4) = cpu_to_be32(readl(&mb->data[1]));
+
+ /* reactive RX buffer */
+ if (i == FLEXCAN_RX_EXT_ID)
+ writel(FLEXCAN_MB_CNT_CODE(0x4)|0x600000,
+ &regs->cantxfg[i].can_ctrl);
+ else
+ writel(FLEXCAN_MB_CNT_CODE(0x4),
+ &regs->cantxfg[i].can_ctrl);
+
+ /* mark as read */
+ writel((0x01 << i), &regs->iflag1);
+ /* release MB lock */
+ readl(&regs->timer);
+
+ netif_receive_skb(skb);
+
+ stats->rx_packets++;
+ stats->rx_bytes += cf->can_dlc;
+
+ return 1;
+
+}
+#else
+
static void flexcan_read_fifo(const struct net_device *dev,
struct can_frame *cf)
{
@@ -466,9 +617,16 @@ static void flexcan_read_fifo(const stru
reg_ctrl = readl(&mb->can_ctrl);
reg_id = readl(&mb->can_id);
- if (reg_ctrl & FLEXCAN_MB_CNT_IDE)
+ if (reg_ctrl & FLEXCAN_MB_CNT_IDE) {
+#ifdef CONFIG_COLDFIRE
+ /* ColdFire can_id order as follow */
+ cf->can_id = (reg_id & CAN_EFF_MASK) >> 18;
+ cf->can_id |= (reg_id & 0x3ffff) << 11;
+ cf->can_id |= CAN_EFF_FLAG;
+#else
cf->can_id = ((reg_id >> 0) & CAN_EFF_MASK) | CAN_EFF_FLAG;
- else
+#endif
+ } else
cf->can_id = (reg_id >> 18) & CAN_SFF_MASK;
if (reg_ctrl & FLEXCAN_MB_CNT_RTR)
@@ -503,6 +661,7 @@ static int flexcan_read_frame(struct net
return 1;
}
+#endif
static int flexcan_poll(struct napi_struct *napi, int quota)
{
@@ -554,6 +713,14 @@ static irqreturn_t flexcan_irq(int irq,
reg_iflag1 = readl(&regs->iflag1);
reg_esr = readl(&regs->esr);
writel(FLEXCAN_ESR_ERR_INT, &regs->esr); /* ACK err IRQ */
+#ifdef CONFIG_COLDFIRE
+#ifdef CONFIG_FLEXCAN_NORXFIFO
+ writel(FLEXCAN_ESR_BOFF_INT, &regs->esr);
+#else
+ /* ACK TWRN and RWRN error, and bus-off interrupt*/
+ writel(FLEXCAN_ESR_ERR_STATE, &regs->esr);
+#endif
+#endif
/*
* schedule NAPI in case of:
@@ -575,13 +742,14 @@ static irqreturn_t flexcan_irq(int irq,
&regs->ctrl);
napi_schedule(&priv->napi);
}
-
+#ifndef CONFIG_FLEXCAN_NORXFIFO
/* FIFO overflow */
if (reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_OVERFLOW) {
writel(FLEXCAN_IFLAG_RX_FIFO_OVERFLOW, &regs->iflag1);
dev->stats.rx_over_errors++;
dev->stats.rx_errors++;
}
+#endif
/* transmission complete interrupt */
if (reg_iflag1 & (1 << FLEXCAN_TX_BUF_ID)) {
@@ -676,9 +844,14 @@ static int flexcan_chip_start(struct net
*
*/
reg_mcr = readl(&regs->mcr);
+#ifdef CONFIG_FLEXCAN_NORXFIFO
+ reg_mcr |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT |
+ FLEXCAN_MCR_SUPV;
+#else
reg_mcr |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_FEN | FLEXCAN_MCR_HALT |
FLEXCAN_MCR_SUPV | FLEXCAN_MCR_WRN_EN |
FLEXCAN_MCR_IDAM_C;
+#endif
dev_dbg(dev->dev.parent, "%s: writing mcr=0x%08x", __func__, reg_mcr);
writel(reg_mcr, &regs->mcr);
@@ -713,9 +886,19 @@ static int flexcan_chip_start(struct net
writel(0, &regs->cantxfg[i].can_id);
writel(0, &regs->cantxfg[i].data[0]);
writel(0, &regs->cantxfg[i].data[1]);
-
+#ifdef CONFIG_FLEXCAN_NORXFIFO
+ if (i == FLEXCAN_TX_BUF_ID)
+ continue;
+ if (i == FLEXCAN_RX_EXT_ID) /* enable receive extend message */
+ writel(FLEXCAN_MB_CNT_CODE(0x4)|0x600000,
+ &regs->cantxfg[i].can_ctrl);
+ else
+ writel(FLEXCAN_MB_CNT_CODE(0x4),
+ &regs->cantxfg[i].can_ctrl);
+#else
/* put MB into rx queue */
writel(FLEXCAN_MB_CNT_CODE(0x4), &regs->cantxfg[i].can_ctrl);
+#endif
}
/* acceptance mask/acceptance code (accept everything) */
@@ -772,6 +955,7 @@ static void flexcan_chip_stop(struct net
return;
}
+
static int flexcan_open(struct net_device *dev)
{
struct flexcan_priv *priv = netdev_priv(dev);
@@ -786,6 +970,24 @@ static int flexcan_open(struct net_devic
err = request_irq(dev->irq, flexcan_irq, IRQF_SHARED, dev->name, dev);
if (err)
goto out_close;
+ err = request_irq(dev->irq + 1, flexcan_irq, \
+ IRQF_DISABLED, dev->name, dev);
+ if (err) {
+ free_irq(dev->irq, dev);
+ goto out_close;
+ }
+#if defined(CONFIG_M548X)
+ err = request_irq(dev->irq + 2, flexcan_irq, \
+ IRQF_DISABLED, dev->name, dev);
+#elif defined(CONFIG_M5441X)
+ err = request_irq(dev->irq + 3, flexcan_irq, \
+ IRQF_DISABLED, dev->name, dev);
+#endif
+ if (err) {
+ free_irq(dev->irq, dev);
+ free_irq(dev->irq + 1, dev);
+ goto out_close;
+ }
/* start chip and queuing */
err = flexcan_chip_start(dev);
@@ -813,6 +1015,14 @@ static int flexcan_close(struct net_devi
flexcan_chip_stop(dev);
free_irq(dev->irq, dev);
+#ifdef CONFIG_COLDFIRE
+ free_irq(dev->irq + 1, dev);
+#if defined(CONFIG_M548X)
+ free_irq(dev->irq + 2, dev);
+#elif defined(CONFIG_M5441X)
+ free_irq(dev->irq + 3, dev);
+#endif
+#endif
clk_disable(priv->clk);
close_candev(dev);
@@ -854,14 +1064,23 @@ static int __devinit register_flexcandev
clk_enable(priv->clk);
+#if !defined(CONFIG_M548X)
/* select "bus clock", chip must be disabled */
flexcan_chip_disable(priv);
reg = readl(&regs->ctrl);
reg |= FLEXCAN_CTRL_CLK_SRC;
writel(reg, &regs->ctrl);
+#endif
flexcan_chip_enable(priv);
+#ifdef CONFIG_FLEXCAN_NORXFIFO
+ /* set freeze, halt and restrict register access */
+ reg = readl(&regs->mcr);
+ reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT |
+ FLEXCAN_MCR_SUPV;
+ writel(reg, &regs->mcr);
+#else
/* set freeze, halt and activate FIFO, restrict register access */
reg = readl(&regs->mcr);
reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT |
@@ -880,6 +1099,7 @@ static int __devinit register_flexcandev
err = -ENODEV;
goto out;
}
+#endif
err = register_candev(dev);
@@ -901,17 +1121,19 @@ static int __devinit flexcan_probe(struc
struct net_device *dev;
struct flexcan_priv *priv;
struct resource *mem;
- struct clk *clk;
+ struct clk *clk = NULL;
void __iomem *base;
resource_size_t mem_size;
int err, irq;
+#ifndef CONFIG_COLDFIRE
clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "no clock defined\n");
err = PTR_ERR(clk);
goto failed_clock;
}
+#endif
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
@@ -943,7 +1165,12 @@ static int __devinit flexcan_probe(struc
dev->flags |= IFF_ECHO; /* we support local echo in hardware */
priv = netdev_priv(dev);
+#ifdef CONFIG_COLDFIRE
+ /* return value is core clock but we need bus clock */
+ priv->can.clock.freq = (clk_get_rate(clk)/2);
+#else
priv->can.clock.freq = clk_get_rate(clk);
+#endif
priv->can.bittiming_const = &flexcan_bittiming_const;
priv->can.do_set_mode = flexcan_set_mode;
priv->can.do_get_berr_counter = flexcan_get_berr_counter;
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